<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <title>Document</title>
</head>
<style>
    header,
    main,
    footer {
        width: 1200px;
        margin: 10px auto;
    }

    header {

        height: 150px;
        background-color: cornflowerblue;
    }

    main {
        height: 400px;
        background-color: rgb(216, 237, 100);

    }

    footer {

        height: 150px;
        background-color: cornflowerblue;
    }

    .left,
    .center,
    .right {
        float: left;
        height: 100%;
    }

    .left {
        width: 200px;

        background-color: darkgoldenrod;

    }

    .center {
        width: 760px;

        background-color: rgb(25, 84, 212);
        margin: 0 20px;

    }

    .right {
        width: 200px;

        background-color: darkgoldenrod;

    }
</style>

<body>
    <header></header>
    <main>
        <div class="left"></div>
        <div class="center"></div>
        <div class="right"></div>
    </main>
    <footer></footer>
</body>

</html>